Patent US2646263A successfully refreshed from Google Patents.
US2646263A
Expired / Lapsed
US
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Smoke and spark arrester for cupolas
Assignee: Modern Equipment Co
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Filing: 1949-12-27
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Granted: 1953-07-21
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Expires: 1969-12-27
Abstract
No abstract record available.
Inventors
- 👤 Max W Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:36
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/18; Y; Y10; Y10S; Y10S261/00; Y10S261/09; Y10S266/00; Y10S266/90; Y10S55/00; Y10S55/20; Y10S55/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE285406C
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US1027951A
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FR439106A
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US1135913A
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US1170308A
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US1339112A
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US1609611A
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US1690326A
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US2041826A
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FR827261A
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US2414135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |